167 



Planorbis virens g^ 

 vortex 82, 85 

 vulgaris 82 

 wheatleyi 97, 98 

 ^■zabalensis 82, 86 

 Planorbula (97), 98 

 armigera 98 

 christyi gg 

 Plcsiophvsa loi 

 Pleurocera lib 



canaliculata lib 

 Pleiirolimnsea (60), 63, 64 



tenuicostata 60 

 Poevia (108) 



gundlachioides 108 

 Polita (39) 



fulva (40) 

 Pol^'gvra 24 



albolabris 2b 

 Columbiana 24, 34 

 devia 24 

 gerinana 2^, 26 

 labiosa (24) 

 megasoma 26 

 monodon 36 

 pt}chophora 25 

 santacruzensis 24 

 townsendiana 2^ 

 PolygvTus (S3) 

 Polvrhytis (61), 63, 64 

 Pomatiopsis iig 



lapidaria 119, (120) 

 Pompholyx 63 

 Primella raymondi (139) 

 Pristiloma 44 

 arclica 4^ 

 idahoense 44 

 lansingi 44 

 pilsbrvi 44 

 stearnsi (44), 45 

 slearnsii 44 

 taylori 44 

 Proph^saon 4b 

 andersoni 4b 

 coeruleum ^7 

 dubium (47) 

 fasciatum {47) 

 flavum (46) 

 foliolatum ^7 



Prophysaon bemphilli (46), 47 



humile ^7 



marmoratum (46) 



obscurum (47) 



pacificuin (46) 



pallidum (46) 



suffusum (46) 

 Proptera alatus (127) 

 Protancylus 109 

 Pseudohyalina minuscula (43) 



pugetensis (43) 

 Pterosygna 131 

 Pulmobranchia loi 

 Punctum _5j 



asteriscus 53 



clappi 51, jj 



conspectum 10, £j 



minutissimum (53) 



pugetensis (43) 



pygmaeum j_j 



randolplii 5J 

 Pupa altiiola (54) 



arctica (32) 



armifera (27) 



badia {28) 



bigranata (28) 



blandi (28) 



columella (54) 



contracta (27) 



corpulenta (29) 



costulata (21) 



decora (29) 



edentula (54) 



exigua (116) 



gouldii (30) 



gredleri (54) 



holzingeri {28) 



hoppii (29) 



lundstromi (28) 



milium (32) 



modesta (29) 



pentodon (28) 



pygma^a (33) 



signata (28) 



simplex (54) 



steenbuchi (29) 



superioris (33) 

 Pupidx 27 

 Papilla 28 



